feat(pool): add table-driven account batch actions

frontend/src/i18n/messages.ts

@@ -1067,6 +1067,7 @@ const legacyExactEnglishMessages: Record<string, string> = {
   '选择一个或多个分组': 'Select one or more groups',
   '暂无用户分组': 'No user groups',
   '选择批量动作': 'Select batch action',
+  '选择执行动作': 'Select action to execute',
   '只会提交当前动作对应的字段': 'Only fields for the current action will be submitted',
   '批量修改用户角色': 'Batch update user roles',
   '将所选用户统一调整为同一个角色。管理员角色拥有后台管理权限，请确认选择范围。': 'Set selected users to the same role. Admin roles have backend management permissions, so verify the target scope.',
@@ -2581,6 +2582,7 @@ const legacyDynamicPatterns: Array<[RegExp, (match: RegExpMatchArray) => string]
   [/^成功 (.+) 个，失败 (.+) 个$/u, match => `Succeeded ${match[1]}, failed ${match[2]}`],
   [/^批量操作完成：成功 (.+) 个，失败 (.+) 个$/u, match => `Batch action complete: succeeded ${match[1]}, failed ${match[2]}`],
   [/^匹配 (.+) 个，当前页 (.+) 个，已选 (.+) 个$/u, match => `Matched ${match[1]} items, current page ${match[2]} items, selected ${match[3]} items`],
+  [/^已选 (.+) 个$/u, match => `Selected ${match[1]} items`],
   [/^已强制下线 (.+) 个设备$/u, match => `Signed out ${match[1]} devices`],
   [/^用户已(.+)$/u, match => `User ${translateLegacyByTokens(match[1]).toLowerCase()}d`],
   [/^(.+)用户失败$/u, match => `Failed to ${translateLegacyByTokens(match[1]).toLowerCase()} user`],